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钙离子荧光探针Fura Red,AM *CAS 149732-62-7*

英文名称:Fura Red, AM *CAS 149732-62-7*
产品参数
Ex (nm)435Em (nm)639
分子量1088.99溶剂DMSO
存储条件在零下15度以下保存, 避免光照
产品概述

Fura Red 是一种可见光激发的 fura-2 类似物,与单激发绿色荧光钙指示剂一起使用时,通过显微光度法、成像或流式细胞术对单细胞中的钙离子进行比例测量提供了独特的可能性。 Fura Red AM 是 Fura Red 的细胞渗透版本,用于无创细胞内装载。 Fura Red AM 可以与 Fluo-3 AM、Fluo-8 AM 或 Cal-520 AM 同时加载到细胞中。组合两种钙染料的优点是可以使用具有更长激发波长的染料。与使用紫外光或近紫外光(例如 Fura-2)激发的比率染料相比,这通常对细胞造成的伤害较小,因为可见波长的光的光毒性较小。

点击查看光谱

 

适用仪器


荧光酶标仪  
Ex: 435,470nm
Em: 630,650 nm
Cutoff: Ex/Em = 435/630, cutoff 610. Ex/Em = 470/650, cut off 630
推荐孔板: 黑色透明底板
读取模式: 底读模式/可分液处理
实验方案

实验方案

储备溶液配制

在高质量无水DMSO制备2至5 mM 的Fura Red AM中储备溶液。

 

工作溶液配制

Fura Red AM工作溶液
1.在实验当天,将Fura Red AM溶解在DMSO中,或将指示剂储备溶液的等分试样解冻至室温。

2.在含有0.04%Pluronic®F-127的缓冲液(例如Hanks和Hepes缓冲液)中制备2至20µM Fura Red AM工作溶液。对于大多数细胞系,建议使用最终浓度为4-5μM的Fura Red AM。细胞负载所需指示剂的确切浓度请根据经验确定。

注:非离子洗涤剂Pluronic F-127用于提高Fura Red AM的水溶性。可从百萤购买各种Pluronic F-127溶液。
注:如果你的细胞含有有机阴离子转运蛋白,可以将丙磺舒(1-2mM)添加到染料工作溶液中(最终井内浓度为0.5-1mM),以减少酯化指示剂的泄漏。多种形式的丙磺舒产品,包括水溶性、钠盐和稳定溶液,可从百萤购买。

 

操作步骤

以下是我们推荐的将AM酯加载到活细胞中的方案。本方案仅提供指南,实际应根据您的具体需求进行修改。

1.在生长培养基中培养细胞过夜。
2.第二天,将1X Fura Red AM工作溶液添加到孔板中。
注意:如果你的化合物干扰血清,在染色前用新鲜的HHBS缓冲液代替生长培养基。
3.将加入染料的孔板在37°C的细胞培养箱中培养30至60分钟。
注:将染料培养2小时以上可以提高某些细胞系的信号强度。
4.用HHBS或您选择的缓冲液(含有阴离子转运蛋白抑制剂,如1mM丙磺舒)代替染料工作溶液,以去除任何多余的探针。
5.根据需要添加刺激物,并同时使用配备有FITC滤波片组的荧光显微镜或包含可编程液体处理系统(如FDSS、FLIPR或FlexStation)的荧光酶标仪在490/525nm,Cutoff=515nm处检测荧光强度。

 

试剂应用文献

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参考文献

Ratiometric analysis of fura red by flow cytometry: a technique for monitoring intracellular calcium flux in primary cell subsets
Authors: Wendt ER, Ferry H, Greaves DR, Keshav S.
Journal: PLoS One (2015): e0119532
 
A flow cytometric comparison of Indo-1 to fluo-3 and Fura Red excited with low power lasers for detecting Ca(2+) flux
Authors: Bailey S, Macardle PJ.
Journal: J Immunol Methods (2006): 220
 
Use of co-loaded Fluo-3 and Fura Red fluorescent indicators for studying the cytosolic Ca(2+)concentrations distribution in living plant tissue
Authors: Walczysko P, Wagner E, Albrechtova JT.
Journal: Cell Calcium (2000): 23
 
Monitoring calcium in outer hair cells with confocal microscopy and fluorescence ratios of fluo-3 and fura-red
Authors: Su ZL, Li N, Sun YR, Yang J, Wang IM, Jiang SC.
Journal: Shi Yan Sheng Wu Xue Bao (1998): 323
 
Problems associated with using Fura-2 to measure free intracellular calcium concentrations in human red blood cells
Authors: Blackwood AM, Sagnella GA, Mark and u ND, MacGregor GA.
Journal: J Hum Hypertens (1997): 601
 
Calcium transient alternans in blood-perfused ischemic hearts: observations with fluorescent indicator fura red
Authors: Wu Y, Clusin WT.
Journal: Am J Physiol (1997): H2161
 
IgG-induced Ca2+ oscillations in differentiated U937 cells; a study using laser scanning confocal microscopy and co-loaded fluo-3 and fura-red fluorescent probes
Authors: Floto RA, Mahaut-Smith MP, Somasundaram B, Allen JM.
Journal: Cell Calcium (1995): 377
 
Localization of calcium entry through calcium channels in olfactory receptor neurones using a laser scanning microscope and the calcium indicator dyes Fluo-3 and Fura-Red
Authors: Schild D, Jung A, Schultens HA.
Journal: Cell Calcium (1994): 341
 
Improved sensitivity in flow cytometric intracellular ionized calcium measurement using fluo-3/Fura Red fluorescence ratios
Authors: Novak EJ, Rabinovitch PS.
Journal: Cytometry (1994): 135
 
The distribution of intracellular calcium chelator (fura-2) in a population of intact human red cells
Authors: Lew VL, Etzion Z, Bookchin RM, daCosta R, Vaananen H, Sassaroli M, Eisinger J.
Journal: Biochim Biophys Acta (1993): 152